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One atom of an element weight 3.32xx10^(...

One atom of an element weight `3.32xx10^(-25)` g. How many number of gram atoms are in 20 kg of the element?

A

2000

B

20

C

200

D

1000

Text Solution

Verified by Experts

Atomic mass of an element
= Mass of one atom `xx N_A`
`=3.32xx10^(-23)xx6.023xx10^23=19.99=20g`
No. of gram atoms
`=("Mass of element in grams")/("Atomic mass in grams")=(20xx1000)/(20)=1000`
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